logiguard fork: GPUI xdg-activation keyboard-focus serial fix

Single-commit orphan branch: full zed-industries/zed @ 8c74db0 source tree
with a 3-file patch applied (no upstream history).

Patch (crates/gpui_linux/src/linux/wayland/):
  - serial.rs: add SerialKind::KeyboardEnter
  - client.rs: store wl_keyboard.enter serial; add latest_serial_of()
  - window.rs: activate() uses keyboard-enter serial (Mutter focus gate)

Mutter honors window activation only when the token carries the keyboard-
focus serial from wl_keyboard.enter; GPUI used a stale mouse-press serial.
See docs/tray-window-focus-wayland.md in logiguard.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

crates/audio/src/audio.rs

@@ -0,0 +1,47 @@
+use std::time::Duration;
+
+use rodio::{ChannelCount, SampleRate, nz};
+
+pub const REPLAY_DURATION: Duration = Duration::from_secs(30);
+pub const SAMPLE_RATE: SampleRate = nz!(48000);
+pub const CHANNEL_COUNT: ChannelCount = nz!(2);
+
+mod audio_settings;
+pub use audio_settings::AudioSettings;
+pub use audio_settings::LIVE_SETTINGS;
+
+mod audio_pipeline;
+pub use audio_pipeline::Audio;
+pub use audio_pipeline::{AudioDeviceInfo, AvailableAudioDevices};
+pub use audio_pipeline::{ensure_devices_initialized, resolve_device};
+// TODO(audio) replace with input test functionality in the audio crate
+pub use audio_pipeline::RodioExt;
+pub use audio_pipeline::init;
+pub use audio_pipeline::{open_input_stream, open_test_output};
+
+#[derive(Debug, Copy, Clone, Eq, Hash, PartialEq)]
+pub enum Sound {
+    Joined,
+    GuestJoined,
+    Leave,
+    Mute,
+    Unmute,
+    StartScreenshare,
+    StopScreenshare,
+    AgentDone,
+}
+
+impl Sound {
+    fn file(&self) -> &'static str {
+        match self {
+            Self::Joined => "joined_call",
+            Self::GuestJoined => "guest_joined_call",
+            Self::Leave => "leave_call",
+            Self::Mute => "mute",
+            Self::Unmute => "unmute",
+            Self::StartScreenshare => "start_screenshare",
+            Self::StopScreenshare => "stop_screenshare",
+            Self::AgentDone => "agent_done",
+        }
+    }
+}